HT instruments EQUITEST5071 - Manual (Page 27)

EQUITEST 5071
EN - 25
6.4.4. "P-PE" mode: measurement procedure and results
1. Select the P-PE mode using the F1 key.
2. Insert the 3 Black, Green, Blue connectors of the shuko cable or of the separate cables into
the relevant instrument input terminals B1, B3, B4 (see Fig. 10, Fig. 11, Fig. 12). In case
separate cables are used, insert alligator clips on the free cable ends.
Fig. 10: Connection for measuring P-PE
impedance of single-phase/two-phase
230V system
Fig. 11: Connection for measuring P-PE
impedance of three-phase 400V + N
system
Fig. 12: Connection for P-PE impedance of three-phase 230V o 400V system without N
3. Insert the Shuko plug into a 230V 50Hz socket or the alligator clips onto the conductors
of the three-phase system (see Fig. 10, Fig. 11, Fig. 12)
4. The F4 key allows setting the limit value for contact voltage. The instrument carries out
the test, checking that the contact voltage found on the system masses, with regard to
the actual current applied, does not exceed the limit value set. You may select one of
the two possible values: 50V (default), 25V
5. Press the START key once. The instrument carries out the test by circulating a current
of type "0°". Otherwise, press the START key twice before the dashes disappear. The
instrument carries out the test by circulating a current of type "180°".
CAUTION
 The following test entails the circulation of a current of approx. 6A
between phase and earth. This could cause the tripping of possible
magnetothermal or residual current protections. In this case, carry out the
measurement upstreams of the protection. In case of AC residual current
protections you may try and detect what kind of waveform (type 0° or type
180°) does not cause the protection’s tripping.
 When message "MEASURING…" is displayed, this indicates that the
instrument is carrying out the test. Never disconnect the instrument’s
leads during this phase.